release: open source extract_so_from_deb (#1475)

extract_so_from_deb.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+#
+# Given a deb, extract mod_pagespeed.so and mod_pagespeed_ap24.so.  This is
+# useful for running load tests on prior releases.  The files are left in a temp
+# directory, and the path to them is printed to stdout.
+
+set -e  # exit script if any command returns an error
+set -u  # exit the script if any variable is uninitialized
+
+if [ ! $# -eq 1 ]; then
+  echo "Usage: ./extract_so_from_deb.sh mod-pagespeed-beta_current_amd64.deb"
+  exit 1
+fi
+
+if [ ! -e $1 ]; then
+  echo "File '$1' not found."
+  exit 1
+fi
+
+input_deb=$(readlink -e $1)
+
+TMP=$(mktemp -d)
+cd "$TMP"
+mkdir scratch
+cd scratch
+
+ar vx "$input_deb" > /dev/null
+# all deb files have a data.tar.gz, which is now in the current directory.
+tar -x --file=data.tar.gz \
+    --wildcards ./usr/lib/apache2/modules/mod_pagespeed\*.so
+
+mv usr/lib/apache2/modules/* ..
+cd ..
+rm -r scratch/
+
+echo "The .so files are:"
+for x in $PWD/*; do
+  echo "  $x"
+done | sort -r